Reversing device for internal-combustion engines.



PATENTED APR. 7, 1908.

E. A. RUNDLUF. I REVERSING DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JUNE 7-, 1907.

2 SHEETSSHBET 1.

I Invfi'iar have. 7.

Witnew'w No. 883,750. PATENTBD APR. 7, 1908.

E. A. RUNDLUP.

REVERSING DEVICE FOR INTERNAL COMBUSTION ENGINES;

APPLICATION FILED JUNE 7, 1907- -2 SHEETSSHEET 2.

- oi'llpump having two pistons 2 and 3, the one Combustion Engines,

UNITED srnrrnsfnrnnr OFFICE.

ERliK ANTON RUNDLOF, or STO'OKSUND, swnnnn.

REVEBSIN G DEVICE FOR INTERNAL-COMBUSTION: ENGINES.

Specification of Letters Patent.

Patented April 7, 1908..

Application filed June 7, 1907. Serial No; 317,702.

To all whom it may concern.

Be it known that I, ERIK ANTON RUNDLoF,

a subject of the King of Sweden, and resident of Stocksund, in the Kingdom of Sweden, have invented new and useful Improvements .in Reversing Devices for Internal-f of which the following is a' specification, referencebeing had tothe drawings accompanying and forming a part hereof.

This invention relates to'devices-for reversing the direction ofmovernent ininternal combustion engines.

The invention consists, chiefly, in midmg the; eng1ne', 'in addition to the ceding mechanism periodicallyfelfecting the explosions during the "normalrunning, also .with' an auxiliary arran ement to be thrown into action instead of t e former one, said latter arrange in suc take place, when the piston moves inwardly, toward the explosion chamber, the two feeding devices being so arranged relatively to each other that, whenthe one is thrown in'to action, the other is simultaneously automatically thrown out of action, and vice versa. Furthermore, the shaft of theengine may beconnected to the two feeding mech- ,amsms such avmanner that the auxiliary feeding mechanisml-can be thrown into ac,- tion ,by the said connection. and be automatically thrown out of action thereby, as soon asthe engine has changed its direction of movement: I

In the accompanying drawings I have Figure 1 is a side-elevation. of a etroleum motor provided with a reversing evice ac-' cording to this invention. Fig. 2 shows thereversing device on'a larger scale, the pump casing being shown partly in'section; Figs.

3-to5show details. a I

Referring to the drawings, 1 represents an apted to work during'normal conditions,

when the engine is running 'in one or the carried by the said lever. weights 7- and 8 is provided with a tooth 1'1 'or 12, ms ectfvely, adapted to -catch"in"'anotch, 0r 'th ment being connected to the engine a manner as to cause the explosions to tive.

the embodimentii ustrated the arm 17, is a shaft 14.-

other direction, whil'e the other 3 is used for reversing.

4 and 5 are two lovers rigidly connected to 1 common fulcrum-.6, {Each}- ever 4 and 5 carries a weight 7 and 8, respectively, each each other, said levers-,bein pivoted'on a mounted on a pivotpin 9 or '10, res ectively,

jEac of the ltlvellyf 13 is-a'n eccentric, *or-thelike, fixed on a.

( shaft 14 mechanically c'onnected'to the shaft of thengine, The eccentric 13ziscon .65 e like, in the piston 2.01 3, respec.

nected, bymeans of an eccentric-rod 1 5,: to

endof the rod 15.

17, and 18 are two regulator planes or arms; rigidly connected. to each other, saidgarms beingsuitably pivoted on a' commonfpivot pin 19; and20 and 2l are two springs. The

weight 7 is kept by the springffl in contact with the arm 17, and the we t 8 is kept by the spring 21 in contact with the arm 18.

22 is an abutment, for instance a-pin, on which the-arm 17 normally bears, and 23 is another similar abutment on which the arm 18 bears, I when the "correspondin feeding mechanism working during reversa 1s opera- 24 is a spring tend in tokeep the arm 17". in its normalpositio'n earingon the abut ment 22, as shown 'in Fig. 1. The arm 18 is one of the said levers, for instance ,by a pin 6 entering. a corresponding socketab then kBPt away from the abutment 23 in the weight Biromstnkihg the piston 3.

such a position as to reventthe tooth '12 of Journaled on a' in 25 on the one arm, in

rod 26, or the like, extending downwardly to the shaft 14. The saidrod is suitably pro vided with a frame'27, or the like, surrounding the shaft 14, and,-the rod '26, or the frame 27, is rovided with 'an: arrangement by which t e frame 27 can be held against-the v 28-is a pivot pin on the rod 26, and mount ed on thesaid pin-is a rod 29 connected to a' lever or hand-spike. 31by another pivot pin 30'situated between a handle 32 suitably rovided on the lever 31 and the in 33 on w ich the lever 31 is pivoted. Tl ie shaft is advantageously provided with one or more friction disks against which the rod 26, or the are.

frame 27, can be pressed, the edges of the frame being suitablyv formed ta ering inwardly so as to correspond with tiie friction disks 34.

The described mechanism works in the following manner: The engine is sup osed' to run in such a direction as to cause t e shaft sha t proper or another shaft, or the like,

piston 2 is in action. .It works in known ing to the lever-'4 a rocking motion by which the weight 7-'is reciprocated on the arm 17. The mechanisms for feeding the fuel work in well known manner so that the action of the same need not be described. The feed ing mechanism for'rever'sal is, in the arrangement illustrated, of' the same construction and acts in thesame manner as that. working in normal running but should suitably. be adjusted to work at a speed suitable for reversal, independently of the speed for which the feeding mechanism operating during normalrunning is adjusted. v

a The reversal of the directionof movement of the engine takes place ,in the following manner: The hand-spike 31 is thrown to the right so thatflthe left edge of the frame 27 is throwninto engagement with the friction disk 34 (or the friction disks) on the shaft 14, whereby the frame and the'rod 26 are lifted by the'shaft. On account thereof the arm' 17 is lifted from the abutment 22 and at the same time the-arm 18 is moved from the position illustrated toward the abutment 23. The action of this shifting of the two arms 17 manner, the eccentric 13, or the like, impart and 18 is first'of all that the weight -7 is' raised, so that its tooth 11 cannot strike the piston 2, and that the weight 8 takes up such a position as to be able to strike the corresponding pump piston. The feeding mechamsm working durlng normal running is,

thus, thrown out of action, and the feeding mechanism working particularly for reversal is thrown into action. I

The fact that the one mechanism works for forward andthe other for backward movement will be evident on considering that the wei hts 7 and 8, in one and the same position of t e engine, take u opposite end positions. When the weight 7 1s in thefencl position in which it keeps the piston 2 pressed inwardly (right end position 111 the drawing) the workin piston of the engine is at that end of the cy 'nder next to the explosion chamber, whence it will be driven out by the explosion of the fuel just injected. When the iston has arrived at the other end of the cy lnder, the shaft 14 has made'half a revolution, and

fi'the weight 8 is thus in the end osition in 55' which it will press the correspon ing pump stance, be arranged in such a manner as to tails may, if desired, be replaced by arrangepiston 3 inwardly, in case the reversing arrangement is allowed to work. Hence, supposin this to be the case, the pump piston- 3 fee s fuel into the cylinder, when moving inwardly; the fuel now explodes, before the working piston has reached its innermost position, and thus stops the piston, which is; driven backward so that the engine begins to move in the opposite direction. 5

When, after the shifting of the lever 31 toward the right, the engine commences to rotate in the opposite direction, the'frame 27 with the rod 26' is obviously moveddown-Q wardly. ,On account thereof the arms 17 j and 18 are'automatically shifted,so that the weight 7. is again made operative instead of the weight 8. The explosionswill therefore again take place at the normal time, 'i. e. at; the inner point of turning, so that the engine is continuallydriven in the direction 5, obtained after mversal. If the machine is to be again reversed, the lever-31 is thrown to the left, so that the right edge of the frame 27 is brought into engagement with the friction disks. The described reversing arrangement'can be modified in several ways without'depart ing from the spirit of my invention. The two feeding mechanisms, that for normal running and that for reversal, may, ,for in-v operate the same pump piston or a correspondin arrangement. They can also be so arrange as to be driven from different eccentrics, or instead of by eccentrics they may be driven by 'cams or any other similar device. It is not essential that the two feeding mechanisms be guided by arms, or the like, set at an angle to each other. The particular dements working in the same manner. The essential feature is that the whole works in such a manner that the two feeding mechanisms are operative in different positions of the engine, sothat the one mechanism causes the engine to run in, one or the other direction and the other mechanism causes the direction of movement of the engine to be reversed, whereby' the arrangement is, pref erably, such that the feedin of action and the feeding mechanism used for normal running is, at the same time, automatically thrown into. action, when the direction of movement of. the engine has 20 been reversed. Having now described my invention, what I claim asn'ew and, desire to secure by Letters Patent is: Y

. 1. In an internal combustion engine the 125 combination of a cylinder, a piston movable therein, an explosion chamber situated in the said cylinder, a feeding'mechanism periodically effecting the fuel introductions during normal running of the enginein any direc- 13d mechanism 5 used for reversal is automatical y thrown-out plosion is e ected, when the piston moves in wardly, toward the explosion chamber, and a v connection between the two feeding mechanisms whereb the said mechanlsms can be alternately t own into or out of actlon, substantially as and for the purpose set forth.

2.- In an internal combustion engine the combination of a cylinder, a piston movable therein, an explosion chamber situated in the said cylinder, a feeding mechanism periodically effecting the fuel introductions during normal-running of the engine in any direction, an auxiliar feeding mechanism adapted for reversing t c direction of movement of the engine, said latter mechanism being so connected to the engine as to cause the feeding to take place at such a time that the explosion is effected when the piston moves inwardly, toward the explosion chamber, a connection between the two feeding mechanisms whereby the said mechanisms can be alternately thrown into or out of action, and a connection interposed between the said combined feedin mechanisms and some movable part of t e engine in such a manner that the said latter connection, when causing the feeding mechanism designed for reversal to operate, immediately after reversing the direction of movement of the engine automatically throws the said latter feeding mechanism out of action again, at the same time as the feeding mechanlsm designed for the normal forward or backward runnin is thrown into aotion,substantially as and or the purpose set forth.

3. In an internal combustion engine the combination of a cylinder, a piston movable therein, an explosion chamber situated in the said cylinder, two arms set at an angle to each other and mounted to swing on a common pivot, two weights each carried by one of the said arms, one of the said weights being designed for periodically effecting the fuel introductions during normal running of the engine in any direction, whereas the other weight is designed for reversing the direction of movement of the engine, two regulator planes connected to each other and pivoted on a common fulcrum, each plane 006 erating with one of the two weights,

sai planes being so located relatively to each other that, when the one plane is the engine in such a manner that t e said connection, when causing the weight de signed for reversal to operate, immediately after reversing the direction of movement of the engine automatically throws the said lat ter weight out of action again, at the same time as the weight designed for the normal forward or backward running is thrown into action, substantially as and for the purpose set forth.

4. In an internal combustion engine the combination of a cylinder, a piston movable therein, an explosion'chamber situated in the said cylinder, two arms-set at an angle toeach other and mounted to swing on a com-- mon pivot, two weights each carried by one of the said arms, one of the said wei hts being designed for eriodically effecting t e fuel introductions uring normal running of the en gine .in any direction, whereas the other weight is designed for reversing the direction of movement of the engine, two regulator planes connected to each other and pivoted on a common fulcrum, each lane cooperating with one of the two weig ts, said planes being so located relatively to each otherthat, when the one plane is in operative osition, the other plane keeps the other weig tout of operative position, a frame connected to the said regulator planes, a friction disk fastened to a movableshaft of the engine,'said disk being inclosed b the said frame, the latter having such a s a e that it can be moved relatively to the sa1d disk so that one or the otherof the sides of the frame opposite each i other can be pressed against the friction disk:

and, thereby, cause the frame to be moved in one orv the other direction'and, thereby, one or the other regulator plane to be brought into operative position, and a lever connected to the said frame for moving one or the other side thereof into contact with the said friction disk, substantially-as and for the purpose set forth.

In testimony 'whereof I have signed my name to thisspecification in the presence of two subscribin witnesses. EfiIK ANTON RUNDLOF.

Witnesses:

. Fnnnn. Nonnsan, AUG. Sonnn'snn. 

